A two-capillary method based on the Hagen Poiseuille theory was proposed for on-line measurements of dynamic viscosity of hydrocarbons at high temperatures and high pressures. A two-capillary viscometer was designed and proved to be applicable to the viscosity measurements in a mini-tube. The standard uncertainty of dynamic viscosity measurements is identified as (2.22 5.28) % (coverage factor k = 2). N-heptane, n-octane and their binary mixture were tested respectively in the calibration experiments of the viscometer. Results showed that the measured maximum relative deviations of all substances were all within 2% and the average absolute deviations were within 0.72%. Finally viscosities of a kerosene kind hydrocarbon fuel were measured using the two-capillary viscometer at temperature from (303.2 to 513.2) K and supercritical pressures of (3.00 and 4.00) MPa.
Compounds
#
Formula
Name
1
C7H16
heptane
2
C8H18
octane
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
1
Viscosity, Pa*s ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
two-capillary method based on the Hagen-Poiseuille Theory
21
POMD
2
Viscosity, Pa*s ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
two-capillary method based on the Hagen-Poiseuille Theory
21
POMD
2
1
Viscosity, Pa*s ; Liquid
Pressure, kPa; Liquid
Temperature, K; Liquid
Mass fraction - 1; Liquid
Liquid
two-capillary method based on Hagen-Poiseuille theory